1991 Toyota 4Runner NEED HELP

okay heres my dilema I have had 3 certified mechanics look at my 91 4runner each with different theories on what could be wrong we have done all three.
1. My cat was after market.
2. Fuel pump was bad.
3. Fuel filter was bad

okay we did number 3 first and replaced it. Simple enough. Then we went on dropped the fuel tank pulled out the the fuel pump and checked it working just fine. Then we went ahead and tested the cat after putting it all back together fine. Now we just found a fuel leak. My question is.
My car begans to whistle after you hit about 35 miles and hour most time some times it does it after 20mph, you also will hear kinda a puff puff noise coming from the driver side when your driving on occasion. My car was working fine till last month had it for 4 months. Now I was wondering if you guys had any suggestions cause I am out of ideas so is everyone else please?

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Monday, June 29th, 2009 AT 4:37 PM

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Are there any other concerns beyond "My car begans to whistle after you hit about 35 miles and hour most time some times it does it after 20mph, you also will hear kinda a puff puff noise coming from the driver side when your driving on occasion"

No start, stall etc?

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Tuesday, June 30th, 2009 AT 4:58 AM

HOZ3R

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Yes the car stalls but before we dropped the gas tanks it wouldnt even turn on

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Tuesday, June 30th, 2009 AT 10:34 AM

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So the fuel pump went bad. Now it starts but stalls and there is a fuel leak.

Fix the fuel leak and it will restore pressure that the engine needs. Post back f there is a problem still after the fuel leak repair. IF so, what is the fuel pressure?

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Tuesday, June 30th, 2009 AT 7:25 PM

HOZ3R

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Okay will do but the the fuel pump didnt go bad

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Tuesday, June 30th, 2009 AT 10:43 PM

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So you didn't replace the pump?

When you tested the pump, did you just test for volume and didn't do a pressure test?

A pump can still pump but not pump enough to raise the pressure to what it needs to be.